chore: minify json files (@fehmer) (monkeytypegame#6404)

Author: fehmer

frontend/vite.config.prod.js

@@ -10,6 +10,7 @@ import { checker } from "vite-plugin-checker";
 import { writeFileSync } from "fs";
 // eslint-disable-next-line import/no-unresolved
 import UnpluginInjectPreload from "unplugin-inject-preload/vite";
+import { readdirSync, readFileSync, statSync } from "node:fs";
 
 function pad(numbers, maxLength, fillString) {
   return numbers.map((number) =>
@@ -169,6 +170,69 @@ export default {
       ],
       injectTo: "head-prepend",
     }),
+    {
+      name: "minify-json",
+      apply: "build",
+      generateBundle() {
+        let totalOriginalSize = 0;
+        let totalMinifiedSize = 0;
+
+        const minifyJsonFiles = (dir) => {
+          readdirSync(dir).forEach((file) => {
+            const sourcePath = path.join(dir, file);
+            const stat = statSync(sourcePath);
+
+            if (stat.isDirectory()) {
+              minifyJsonFiles(sourcePath);
+            } else if (path.extname(file) === ".json") {
+              const originalContent = readFileSync(sourcePath, "utf8");
+              const originalSize = Buffer.byteLength(originalContent, "utf8");
+              const minifiedContent = JSON.stringify(
+                JSON.parse(originalContent)
+              );
+              const minifiedSize = Buffer.byteLength(minifiedContent, "utf8");
+
+              totalOriginalSize += originalSize;
+              totalMinifiedSize += minifiedSize;
+
+              const savings =
+                ((originalSize - minifiedSize) / originalSize) * 100;
+
+              writeFileSync(sourcePath, minifiedContent);
+
+              console.log(
+                `\x1b[0m \x1b[36m${sourcePath}\x1b[0m | ` +
+                  `\x1b[90mOriginal: ${originalSize} bytes\x1b[0m | ` +
+                  `\x1b[90mMinified: ${minifiedSize} bytes\x1b[0m | ` +
+                  `\x1b[32mSavings: ${savings.toFixed(2)}%\x1b[0m`
+              );
+            }
+          });
+        };
+
+        console.log("\n\x1b[1mMinifying JSON files...\x1b[0m\n");
+
+        minifyJsonFiles("./dist");
+
+        const totalSavings =
+          ((totalOriginalSize - totalMinifiedSize) / totalOriginalSize) * 100;
+
+        console.log(
+          `\n\x1b[1mMinification Summary:\x1b[0m\n` +
+            `  \x1b[90mTotal original size: ${(
+              totalOriginalSize /
+              1024 /
+              1024
+            ).toFixed(2)} mB\x1b[0m\n` +
+            `  \x1b[90mTotal minified size: ${(
+              totalMinifiedSize /
+              1024 /
+              1024
+            ).toFixed(2)} mB\x1b[0m\n` +
+            `  \x1b[32mTotal savings: ${totalSavings.toFixed(2)}%\x1b[0m\n`
+        );
+      },
+    },
   ],
   build: {
     emptyOutDir: true,